Air and gas distributing device



Sept. 12, 1933.

:F. J. KURTH EFAL AIR AND GAS DISTRIBUTING DEVICE Filed Jan. 25, 1933 s Sheets-Shet 1 Sept. 12, 1933. F. J. KURTH El AL AIR AND GAS DISTRIBUTING DEVICE Filed Jan. 25, 1933 s Shets-Sheet 2 Sept. 12, 1933. F. JfKURTH Er AL AIR AND GAS DISTRIBUTING DEV Filed JTn. 25, 1935 ICE 3 Sheets-Sheet 3 Patented Sept. 12, 1933 1,926,778 AIR GAS DISTRIBUTING DEVICE Franz Josef Kurth, Cologne-Dellbruck, and Just Sassenberg, Cologne, Germany; said Sassenberg assignor to said Kurth Application January 25, 1933, Serial No. 653,408, and in Germany March 14, 1932 11 Claims. (CI. 98-40) This invention relates to air and gas distributvary the area of the inlet into the distributing ing devices, and one object of the invention is to element. provide an improved device for this purpose. 'Air and gas distributing devices are known, According to the invention there is provided for example for introducing air into a room, which an air and gas-distributing device comprising a comprise'a number of conical or other funnel- 60 distributing element in the form of a spiral band like partitions arranged one within another to which has its turns opposed to one another and provide-a number of separate throughway passpaced apart to provide between them throughsages which each increase in cross sectional area way passages for the air and gas of gradually infrom their inlet to their outlet ends. It will be creasing volume towards their outlet ends so as app a t d bu devices accord- 65 to effect a reduction in the velocity of the flow ing to the present invention may be regardedas flowing through the distributing element. modifications of these known constructions, in- The spiral band may be formed in any manner asmuch as the spiral band may be considered as which will produce the desired effect, For ina continuous partition which provides between stance, the opposed faces of the spiral band may pp faces of i r hr hw y passages 70 be inclined or normal to its axis. If desired, in f r d al y in r i v lum w r s h outer the former case the turns of the spiral band may edges of t turns of t spiral b be so arranged that the inclination of its opposed The above and Other features of the Present faces decreases from the outer to the inner turns invention which relate to constructional details of the band, and in the latter case the wi the band may increase from one end to the other. to the accompanying win s whi S y According to one feature of the invention the y Of examples several Constructions c o d spiral band is corrugated transversely, thus proto the ti viding a larger surface area and an increased re- I the a sistance to the flow of the fluid. This enables the Figure 1 is a sectional elevation of one con- 80 V distributing element to be made of smaller diru i n, mensions for a given velocity reduction than is Figure 2 is an d r ide View Of the inlet to the case when a plain spiral band is employed. the distributing element,

Figure 3 is a planof the distributing element,

When a number of air and gas distributing devices are arranged in proximity on a single 11 ,Figure 4 is a sectional elevation of a second 85 tribution pipe line, the devices will generally b construction showing the distributing element in of the same size for the sake of presenting a unithe fully p Position, form appearance. In such a es, hith rt in Figure 5 is a similar view to Figure 4 but showder to regulate the quantity of air or gas issuing ing the distributing element e from each distributor, a separate controlling deu e 6 is a ectional elevation of a third 90 vice has been required for each distributor. This Construction, may be a valve arranged in the branch pipe 1ead.. Figure '7 is a sectional elevation of a distributing from the main distribution line to the dising device Which is ul y a j s ab r latributor. Even in the case of distributors fed tive to the inlet conduit with the distributing 40 from separate supply pipes, regulation of the element shown-in the p Position, and

quantity of air or gas issuing from one or more F gu e 8 shows the distributing element of of the distributors is frequently desirable. ure '7 in the closed position.

All the drawings are diagrammatic, and like Another object of the invention is to provide means whereby the quantity of air or gas issuing reference characters indicate like parts throughfrom the distributing device can be regulated Outwithout necessitating the provision of a separate According to t e construction shown in controlling device. ures 1, 2 and 3, the air or gas to be distributed With this object in. view, the invention also is led from any convenient source of supply to provides means for adjusting the turns of the an inlet conduit a which communicates with a spiral band relative to one another in such a way distributing element in the form of a spiral band as to control the passages between them. S which preferably is of uniform or substantial- Any convenient means may be provided for ly-uniform thickness and width throughout or this purpose, for instance means arranged to substantially throughout its length. Surroundmove the inner margins of the turns of the spiral ing the mouth of the inlet conduit (1 is a dishband towards and away from one another to shaped annular plate b to which outer end of am 1 will now be more fully described with reference 75 the spiral band S is anchored at c. The opposed faces of the turns of the spiral band are inclined to the axis of the distributing element and this inclination decreases from about 80-10 in the direction from the outer to the inner turns of the band.

A spider 2' having a centrally arranged screwthreaded socket h is provided in the inlet conduit a and is engaged by a screw-threaded spindle s. The inner end d of the spiral band S has fixed thereto a hollow member 2 through which the spindle s loosely extends, said spindle being provided with a milled disc 1 effecting rotation thereof. A spacing sleeve g is provided between the member 6 and the milled disc. Obviously the sleeve 9 may form part of the milled disc or may be a separate element. In this construction the turns of the spiral band are so arranged that the inner edge of the band, in projection upon a plane at right angles to the axis of the distributing element, forms a fiat spiral.

The air or gas supplied to the inlet conduit (1 flows through the passages between the turns of the spiral band S and as those passages gradually increase in volume in the direction of flow, the velocity of the flow is reduced. In Figure 1 the distributing element is shown in its fully open position. On screwing the spindle through the boss h, pressure is exerted by the milled disc I through the sleeve g against the member e fixed to the inner end of the spiral band and thereby the turns of the spiral band S will be caused to telescope and the inner marginal edges is of said turns will move towards one another, thus throttling the inlets to the passages between the turns of the spiral band. By this means the quantity'of air or gas flowing through the distributing element can be regulated at will.

On turning the spindle s in the reverse direction the spiral band reassumes its former position due to its resiliency. If necessary, in order to increase the resiliency of said band and according to a further feature of the invention, the outer marginal edge of the band may be formed with a bead in which is inserted a reinforcing wire, for example a steel wire, as indicated at w in Figures 1 and 3 of the drawings.

The means for regulating the quantity of air or gas flowing through the distributing element is not an essential feature of the invention and may be dispensed with if desired. In that case, any convenient means may be provided for holding the turns of the spiral band in position. For instance, there may be a rod connecting the end d of the spiral band to the spider z, or alternatively the inner edges is or the outer edges 1 of the turns of the spiral band may be connected together by a number of wire rods in the same way as the separate conical partitions ofthe known devices referred to above are held in position.

Figures 4 and 5 show a construction which in the open position effects only a slight reduction in the velocity of the air or gas. In this construction the opposed faces of the turns of the spiral band are normal to the axis of the distributing element. The band decreases in width from the anchored end 0 and is arranged to be adjusted to regulate the quantity of fluid flowing through the distributor by the means described with reference to Figures 1 to 3 inclusive.

Figure 6 shows a construction similar to that of Figure 1 but with the opposed faces of the spiral band corrugated transversely for the purpose hereinbefore described.

Figures 7 and 8 show a construction comprising means to permit the distributing element to be angularly adjusted relatively to the inlet conduit a. In this construction the spider i is carried by a spherical shell m which is rotatably mounted within a similarly shaped casing n surrounding the mouth of the inlet conduit a. By closing the turns of the spiral together and adjusting the distributing element to the position shown in Figure 8 it is possible to reduce the quantity of fluid issuing from the distributor to an almost negligible quantity.

The invention is not restricted to the specific embodiments described as changes can be made therein without departing from the invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of overlapping convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to their substantially common axis towards the outer end of the strip, a major portion of the axial dimension of the innermost convolution being overlapped by a plurality of the next suc ceeding larger convolutions.

2. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of overlapping convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to their substantially common axis towards the outer end of the strip, each of a plurality of the convolutions of the device having major portions of their axial dimensions overlapped by the next succeeding larger convolution.

3. An air or gas distributing device as set forth in claim 1 in which the strip is of uniform width and thickness.

4. An air or gas distributing device comprising astrip ofsheet material spirally wound to provide a plurality of nested convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with re spect to the axis of the device towards the outer end of the strip, and means for adjusting the convolutions to vary their angularities.

5. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of nested convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to the axis of the device towards the outer end of the strip, and means for telescopically adjusting the convolutions to vary their angularities.

6. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of nested convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to the axis of the device towards the outer end of the strip, and screw means for adjusting the convolutions to vary their angularities.

7. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of nested convolutions having Hill their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to the axis of the device towards the outer endof the strip, a screw threaded member fixed with respect to the outer end of the strip, a stem substantially axially alined with the convolutions and having screw threaded connectionwith said member whereby rotation of the stem effects longitudinal movement thereof, and a connection between said stem and the inner end of the strip whereby the convolutions of the strip are telescoped into one another to decrease their angularity when the stem is rotated to effect inward longitudinal movement thereof.

8. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of nested convolutions having their axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularities with respect to the axis of the device towards the outer end of the strip, a longitudinally adjustable stem axially alined with the oonvolutions of the device, and a connection between said stem and the inner end of the strip whereby inward longitudinal adjustment of the stem effects telescopic adjustment of the convolutions into one another.

9. An air or gas distributing device comprising a strip of sheet material spirally wound to provide a plurality of nested convolutions havingtheir axes disposed in substantially the same straight line, said convolutions being disposed at progressively increasing angularitieswith respect to the axis of the device towards the outer end of the strip, a hollow member fixed to the irmer end of the strip, a screw threaded member fixed with respect to the outer end of the strip, a stem extending loosely through said hollow member and having screw threaded connection with said screw threaded member, and an abutment on said stem engaging the outer end of saidhollow member.

10. An air or gas distributing device as set forth in claim 1 in which the strip is transversely corrugated.

11. An air or gas distributing device as set forth in claim 1 in which a strip reinforcing wire is fastened to and extends along the outer edge of the strip.

FRANZ JOSEF KURTH. JOST SASSENBERG. 

